viper 5704 won’t start by key
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=131233
Printed Date: May 15, 2025 at 9:42 AM
Topic: viper 5704 won’t start by key
Posted By: tufotee
Subject: viper 5704 won’t start by key
Date Posted: April 21, 2012 at 1:00 AM
I installed a 5704 in my 91 240sx
The car remote starts absolutely fine, but when I try to start the car with the key, ignition powers up but starter won't crank.
Heres the issue, when the pink ignition 1 input wire gets power, the starter kill opens, with no power there is continuity between violet and green, with power(ignition on) no continuity, i tested this with a dvom, any ideas?
RED / white, red, and RED / black--connected to white(constant 12v)
Pink-- connected to BLACK/ red
BLACK/ white cut in half---- violet-- green
Any advice would really help, thanks.
Replies:
Posted By: smokeman1
Date Posted: April 21, 2012 at 6:57 AM
Link to Bulldog Security https://www.bulldogsecurity.com/
Take notice of Note *1  BLACK/ White  and  BLACK / YELLOW ------------- When all else fails, Read the Instructions
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Posted By: kreg357
Date Posted: April 21, 2012 at 7:33 AM
Maybe the Viper is locked/armed or thinks it's locked/armed armed all the time.
You could try deleting the Starter Kill circuit/wiring as a test. Disconnect the H3 Green wire and re-connect the
vehicles cut BLACK/ White starter wire. The remote start will still work and the key start should also. If you really need
Starter Kill and/or Anti-Grind you can use an external relay and signals like GWA and GWR.
-------------
Soldering is fun!
Posted By: tufotee
Date Posted: April 21, 2012 at 8:15 AM
I disconnected the pink ignition input/output wire and the car started with the key, reconnect it and nothing, so once again checked continuity through violet and purple with a dvom and with key off I have continuity, as soon as I turn the key to acc I get OL, no continuity, so checked for voltage at the starter input wire and turn the key to crank and get 12v, but when I move to the output wire I have 0v.
To me this seems backwards??
Is there any way to do any kind of "master reset" on the alarm module and try again?
And yea if I can't figure this out I'll just bypass the starter kill and just connect the output wire.
Posted By: tufotee
Date Posted: April 21, 2012 at 8:17 AM
I mean I checked Continuity through violet and green lol
Not violet and purple
Posted By: howie ll
Date Posted: April 21, 2012 at 8:22 AM
The work around:-
Use a standard 5 terminal relay.
Cut the BLACK/ white starter wire.
GWR Orange to 85, inline 1N4004 diode band towards 5704.
30amp fused constant 12V+ to 87.
Link from pink (ignition 1) to 86.
Key side of cut wire to 87a.
Starter side and 5704 heavy VIOLET to 30.
Do you by any chance have the green and violets the wrong way round?
Green to key side and violet to starter side.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: howie ll
Date Posted: April 21, 2012 at 8:24 AM
And OP mine's Twinings English breakfast if you can get that in the US.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: tufotee
Date Posted: April 21, 2012 at 8:33 AM
Ya green is key side and violet is starter side, plus the remote start operates correctly,
Posted By: kreg357
Date Posted: April 21, 2012 at 8:33 AM
Here are the connections :
Viper H3 '91 240SX @ Ignition Switch Harness
H3/1 PINK (+) IGNITION 1 INPUT/OUTPUT BLACK/ Red
H3/2 RED / WHITE (87) FLEX RELAY +12V INPUT (30A FUSED) White
H3/3 ORANGE (+) ACCESSORY OUTPUT Blue
H3/4 VIOLET (+) STARTER OUTPUT (CAR SIDE) BLACK/ White
H3/5 GREEN (+) STARTER INPUT (KEY SIDE) BLACK/ White
H3/6 RED IGNITION 1 +12V INPUT (30A FUSED) White
H3/7 PINK/WHITE (30) FLEX RELAY OUTPUT ***Set for Starter2*** BLACK / YELLOW ***Menu 3, Item 8, Opt3***
H3/8 PINK/BLACK (87a) FLEX RELAY INPUT Not Used
H3/9 RED / BLACK ACC/STARTER RELAY +12V INPUT (30A FUSED) White
H3/10 NC No Connection
-------------
Soldering is fun!
Posted By: tufotee
Date Posted: April 21, 2012 at 8:41 AM
That's exactly how it's connected
Posted By: howie ll
Date Posted: April 21, 2012 at 8:53 AM
OK so disconnect the green and join BLACK/ white together leave the violet connected.
You should have key start and remote start and a faulty internal relay.
Do my work around to restore.
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: tufotee
Date Posted: April 21, 2012 at 8:55 AM
Ok will do, Thanks
Posted By: howie ll
Date Posted: April 21, 2012 at 8:58 AM
Now can I have my tea?
-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: tufotee
Date Posted: April 21, 2012 at 8:59 AM
Yes but all I have is tetley haha
Posted By: howie ll
Date Posted: April 21, 2012 at 9:08 AM
The problem is that all the American sold versions are WEAK  ------------- Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
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